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. W. P. TAGG'ART. DRYING FURNAGB.

'N0.5 62,345.- Patented June 16, 1896 AN DREW EGRANAM. PHOTO-HMO. WAS! NGTON. D C

UNITED STATES PATENT OFFICE.

WILLIAM P. TAGGART, OF PHILADELPHIA,PENNSYLVANIA, ASSIGNOR OF ()NEIIALF TO THEODORE I-I. BECHTEL, OF SAME PLACE.

DRYING-FURNACE.

SPECIFICATION forming part of Letters Patent No. 562,345, dated J une 16, 1896.

Application filed December 23, 1895. Serial No. 573,019. (No model.)

To a whom it may concern.-

Be it known that I, WILLIAM P. TAGGART, a citizen of the United States, and a resident of the city and county of Philadelphia, State of Pennsylvania, have invented certain new and useful Improvements in Furnaces, of which the following is a specification.

My invention relates to improvements in furnaces, and more particularly. to improvements in furnaces for drying briquets made from coal-dust or culm, and my invention relates to certain improvements in theconstru 0- tion of the furnace as hereinafter fully set forth.

In the accompanying drawings, forming part of this specification, and in which similar letters of reference indicate similar parts throughout the several views, Figure 1 is a front elevation of my furnace, partly in section, the section being taken on line a: a, Fig. 2; Fig. 2, a plan of the furnace, partly in section, the section being taken on line y y, Fig. 1.; and Fig. 3, a section of Fig. 1 on line z z.

The walls A of the furnace are preferably constructed of brick, and the front and rear walls are preferably covered with iron plates B upon their .ontsides for the purpose of giving additional strength and for preventing loss of heat. The top 0 of the furnace isconstructedof arches, as shown.

The fireplaces D, which are furnished with grate-bars E and ash-pits F, as usual, preferably extend from one side to the other of the furnace and are at each end furnished with doors G, so that they may be fired from both sides.

H are walls extending across the fireplaces at their middles and which divide the fireplaces into two parts.

I are hoods which inclose the top of fireplaces. These hoods are preferably made in section of cast-iron, which may be bolted together as shown.

J are ilues which communicate with the hoods and with the drum L, which communicates with the stack K and through which the smoke and products of combustion pass from the fire-boxes to the stack. The fines are arranged as shown in the drawings, that is, there is a lower horizontal flue upon each side of each fire-box connected by suitable openings with the interior of the hoods I. These horizontal fines extend nearly across the furnace, as shown in Fig. 3. They then turn and pass upward nearly to thetop of the furnace, and then again turn and run horizontally toward the middle of the furnace, where they empty into the drum L, which is connected with the stack as shown.

The flnes J and drum L are constructed of very light metal and by the time the smoke and products of combustion reach the stack K these latter are comparatively cool and hence there is but very little loss of heat through the stack.

The furnace being principally intended for drying briquets which are formed from coaldnst or culm, miXed with a binder in a moist state, it is necessary that it be furnished with vents through which the gases or vapors which are driven oif by the heat from the briquets may be allowed to escape. For this purpose I have placed in the roof of the furnace openings M, which are closed by doors ,N, which latter may be furnished with registers 0, Fig. 2, if desired.

In addition to allowing the escape of gases or vapors from the furnace, the doors or covers N may be opened to allow the rapid escape of heat therefrom when it is necessary to cool the furnace to enable a man to enter to make repairs or to clean it.

In the drawings the furnace is shown furnished with three sets of conveyers a a a (Shown by dotted lines in Fig. 1.) The upper conveyer a carries the briquets into the furnace and upon reaching the pulley 12, around which this conveyer passes, they fall upon the rear end of conveyer a, being guided in their fall by a guide or concave c, Fig. 1. They are carried back upon conveyer a and at its forward end fall upon the forward end of conveyer a being guided in their fall by the guide d. They are then carried by this conveyer to its rear when they fall into the chute e, which carries them out of the furnace. The rear ends of the conveyers are carried upon pulleys Z9 Z) W, which are car ried by shafts ff f which pass through the furnace and are carried in hearings in the outside iron plates 13, which are at this point carried outward. from the walls of the furnace, as shown in Fig. 2, so that the hearings will not be heated by the walls. The upper shaft f may be driven by a pulley g and the motion of this shaft transmitted to the other shafts through gears h h 7L2, as shown. The other or forward ends of the conveyors are carried in a manner similar to that described for their rear ends.

Having thus described my invention, I

claim as new and desire to secure byLetters Patent 1. In a heating-furnace, in combination, the side and top walls forming a heatingchamber, a closed fire box or boxes, flues connecting with the sides of said fire-boxes and extending horizontally along the sides thereof, then up vertically along the walls of said heating-chamber, then horizontally inward, and a drum into which the upper ends of said flues open and which connects with the stack.

2. In a heating-furnace, in combination, the side and top walls forming a heatingchamber, aclosed fire box orboxes extending from one side to the other of said heatingchamber, a wall separating the grate-surface of said fire box or boxes into two parts, flues connecting centrally with each side of said fire box or boxes and extending horizontally along the sides thereof, then up vertically along the sides of said heating-chamber, then horizontally inward, and a drum into which the upper ends of said fiues open and which connects with the stack.

3. In a heating-furnace, in combination, the side and top walls forming a heatingchamber, doors in the top of said heatingchamber, a closed fire box or boxes extending from one side to the other of said heatingehamber, flues connecting with the sides of said fire-boxes and extending horizontally along the sides of the same, then up verti cally along the sides of said heating-chamber, then inwardly, a drum into which the upper ends of said fiues open, and a stack connecting centrally with said drum.

4. The combination of a heating-chamber, a closed fire box or boxes extending from one side to the other of said chamber, flues connecting with said fire-boxes and extending horizontally along the same, then upwardly along the sides of said chamber,then inwardly, a drum into which the upper ends of said flues open, a stack connecting with said drum, a conveyor or conveyers passing in between said flues, sprockets on which said conveyers are carried,shafts for carrying said sprockets, and metal plates carried by and the ends of which extend out from and parallel to the walls of said heatingchamber in which said shafts are journaled, all substantially as and for the purposes set forth.

\VILLIAM I TAGGART.

Witnesses:

E. L. LINDEMUTH, J. MILTON MILLER. 

